Remove a bunch of dead files found by missing_from_gn

sky/tools/missing_from_gn

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import subprocess
 import os
 import argparse
 import logging
 
 ROOT_DIR = os.path.abspath(os.path.join(__file__, os.pardir, os.pardir,
     os.pardir))
 
 # Where to cache GN results (they're expensive to compute).
 GN_CACHE_PATH = os.path.abspath(os.path.join(ROOT_DIR, 'in_gn.txt'))
 
 
 def stripped_lines_from_command(cmd, cwd=None):
     lines = subprocess.check_output(cmd, cwd=cwd).splitlines()
     return map(str.strip, lines)
 
 
 def gn_desc(*args):
     # GN doesn't understand absolute paths yet, so use a relative BUILD_DIR
     # and pass ROOT_DIR as the CWD.
-    cmd = [
-        'gn', 'desc',
-        # Hard-coding Debug for now:
-        os.path.join('out', 'Debug'),
-    ] + list(args)
+    # Hard-coding Debug for now:
+    BUILD_DIR = '//out/Debug' # // means repository root-relative.
+    cmd = ['gn', 'desc', BUILD_DIR] + list(args)
     return stripped_lines_from_command(cmd, cwd=ROOT_DIR)
 
 
 def targets_under(target):
     targets = gn_desc(target, 'deps', '--all')
     return filter(lambda s: s.startswith(target), targets)
 
 
 def used_files(target):
     logging.info(target)
     sources = map(lambda s: s[2:], gn_desc(target, 'sources'))
     inputs = map(lambda s: s[2:], gn_desc(target, 'inputs'))
-    return sources + inputs
+    public = map(lambda s: s[2:], gn_desc(target, 'public'))
+    script = map(lambda s: s[2:], gn_desc(target, 'script'))
+    return sources + inputs + public + script
 
 
 def find_on_disk(path):
     # FIXME: Use os.walk and do fancier ignoring.
     return stripped_lines_from_command(['find', path, '-type', 'f'])
 
 
 def main():
     logging.basicConfig(level=logging.INFO)
 
@@ skipping 25 matching lines @@
 
     # All upper-case files like README, DEPS, etc. are fine.
     missing_from_gn = filter(lambda p: not os.path.basename(p).isupper(),
         missing_from_gn)
 
     print '\n'.join(missing_from_gn)
 
 
 if __name__ == '__main__':
     main()